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          Valve Leader Yuanda Valves
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          14 taboos to install a valve(middle)

          Installing valves is not an easy task. There are 14 taboos.

          Taboo 8: The pipeline is directly buried in frozen soil and untreated loose soil. The distance and location of the pipe piers are improper, even in the form of dry code bricks.

          Consequence: Due to the unstable support of the pipeline, the pipeline was damaged during the compaction of the backfill soil, resulting in rework and repair.

          Measures: The pipeline must not be buried in frozen soil and untreated loose soil. The distance between the pier should meet the requirements of the construction code, and the support pads should be firm, especially at the interface of the pipeline, and it should not bear the shear force. The brick pier should be built with cement mortar to ensure completeness and firmness.

          Taboo 9: The expansion bolts used to fix the pipe bracket are of inferior material. The diameter of the expansion bolts is too large or the expansion bolts are installed on brick walls or even light walls.

          Consequence: The pipe support is loose, the pipe is deformed, or even falls off.

          Measures: Qualified products must be selected for the expansion bolts. If necessary, samples should be tested and tested. The diameter of the expansion bolts installed should not be greater than the outer diameter of the expansion bolts by 2mm. The expansion bolts should be used on concrete structures.

          Cast Iron Ball Valve

          Taboo 10: The flange and gasket of the pipe connection are not strong enough, the connecting bolts are short or the diameter is small. Rubber pipes are used for heat pipes, asbestos pads are used for cold water pipes, and double-layer pads or bevel pads are used. Flange gaskets protrude into the pipes.

          Consequence: The flange connection is not tight, even damaged, and leakage occurs. Flange gaskets protrude into the tube and increase water resistance.

          Measures: The flanges and gaskets for pipelines must meet the requirements of the design working pressure of the pipelines. Rubber asbestos gaskets should be used as flange gaskets for heating and hot water supply pipes; rubber gaskets should be used as flange gaskets for water supply and drainage pipes. The gasket of the flange must not protrude into the pipe, and its outer circle is appropriate to the flange bolt hole. Flange pads or several gaskets must not be placed in the middle of the flange. The diameter of the bolt connecting the flange should be less than 2mm than the diameter of the flange.

          Taboo 11: Incorrect valve installation method. For example, the water (steam) flow direction of the gost globe valve or check valve is opposite to the mark, the valve stem is installed downwards, and the horizontally installed check valve is installed vertically. Do not face the inspection door.

          Consequence: The valve fails, the switch is difficult to repair and repair, and the valve stem often causes water leakage.

          Measures: Install strictly in accordance with the valve installation instructions. The open stem gate valve should be left with the valve stem extended to open height. The cast iron butterfly valve fully considers the handle rotation space. The concealed valve should not only be provided with an inspection door that meets the needs of valve opening and closing, but also the valve stem should face the inspection door.

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